It's an irrelevance. Guns aren't the problem, crazy people, criminals, and such are. Without guns we'd still have just as much violence, only it'd be with knives, hammers, or whatever instead.
The place to start is trying to reduce, or at least restrict, the ability of the crazy, insane, drug addled, and emotionally unstable from getting access to guns. Criminals are going to be a problem regardless. That's true anywhere. I've already suggested a more flexible approach to restricting access to firearms one where you put someone on "The List" fairly easy with some evidence, but they can get off that list fairly easily by contacting the authorities and being interviewed.
That would massively cut down on gun violence on its own. The current system is difficult to put someone on the Red Flag list, and once you are on that list it's nearly impossible to get off it. That 0 - 1 approach is wrong. We need a middle way.